Explore: Expansive Soil


Expansive soils, typically when water is given to them, they will try to swell and water is taken away from them they’ll try to shrink, and the structures that are built on these type of soils cannot do the same as the swelling and shrinking, and hence they will end up having cracks on the pavement surface or on the building if we are looking at single story or two storied residential buildings or commercial buildings. And these end up causing a lot of damage in the form of maintenance because every year or every other year there will be some sort of maintenance that has to happen to rectify this. This is a typical example of expansive soil cracking, where you can see that there is a heave form because of the soil beneath this pavement is exposed to moisture and that moisture is trying to the moisture is causing the soil to swell and the pavement obviously cannot do that, and usually when, if there’s a uniform moisture movement then the whole pavement would rise and it will fall, but because there is access at only this point and the rest of the areas are not really having a lot of access that’s when you’ll see these sort of heavings. So it right now on the maintenance alone, this is a rough number, about six to nine billions of dollars every year just in the United States. So it’s not including the other countries which have these issues. If my method works what we can do is we can inject the nutrient solutions in the form of calcium chloride and urea and they will precipitate calcite in C2 and we are not changing anything on the surface or below the pavement. All they’ll have to do is do some asphalt coating and that will take care of it. We are not using lime at all, so that is less carbon emissions. We are using urea and calcium chloride which production-wise they will cause some sort of carbon emissions, but the concentrations at which we are inputting them is very, very, very low compared to lime. To give you some idea lime is typically anywhere ranging from six to eight percent and we’re using less than one percent of HCl, Cl2 and urea. So that’s quite an advantage compared to the other method. [Music]

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